Please help me with this please.

How do you answer this question? (step by step)

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

Since opening night, attendance at play a has increased steadily, while attendance at play b first rose and then fell. equations modeling the daily attendance y at each play are shown below, where x is the number of days since opening night. on what day(s) was the attendance the same at both plays? what was the attendance? play a: y = 8x + 191 play b: y = -x^2 + 26x + 126